package com.fishleap.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @author zlg
 * 普通类获取spring容器中的bean
 * 在Spring Boot可以扫描的包下写的工具类为SpringUtil，实现ApplicationContextAware接口，
 * 并加入Component注解，让spring扫描到该bean
 */
@Component
public class SpringUtil implements ApplicationContextAware {

    private static final Logger logger = LoggerFactory.getLogger(SpringUtil.class);
    private static ApplicationContext applicationContext = null;

    // 设置ApplicationContext
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (SpringUtil.applicationContext == null) {
            SpringUtil.applicationContext = applicationContext;
        }
        logger.info("ApplicationContext配置成功,applicationContext对象："+SpringUtil.applicationContext);
    }

    // 获取ApplicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }
    public static <T> T getBean(String name,Class<T> clazz) {
        return getApplicationContext().getBean(name,clazz);
    }

}
